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Pictures
supplied by Mike Culling [Senior Development Engineer] and David Drury
[Deputy Chief Engineer], both previously of Pye TVT Ltd., Cambridge. Assistance
with picture identification was also provided by Bill Arnold, ITA Area
Engineer, (Midlands). The equipment was provided by Pye TVT Ltd of Cambridge and consisted finally of two 20kW (visual) + 5kW(aural) transmitter assemblies, one assembly for on-air operation and one assembly on stand-by. Thanks very much to Mike Culling for submitting these unique photos. Thanks also to David Drury and Bill Arnold THIS IS THEIR PAGE
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Construction of new mast The old tower Inside the station & 405 switch off The Transmitter An Open Day
Pye Green Tower Test Card Records contacts and links
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IMAGES OF THE LICHFIELD BAND III TELEVISION TRANSMITTER STATION AFTER COMMISSIONING, AND AT VARIOUS PHASES OF CONSTRUCTION AND INSTALLATION. [C.1956 - 1960] ALSO, INCLUDED ARE IMAGES OF SOME MAJOR ELECTRONIC SUB-ASSEMBLIES. |
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(left) Construction of transmitter hall
(right) Aural Modulator 2 x TBW6-6000 (Mullard)
please click on each picture to enlarge and then "back" on your browser to return
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(left) Aural Modulator [1kw level] 2 x V1505 (Ediswan/AEI)
(right) Left to right: R.C. Harman (Head of Operations and Maintenance), N.G. Payne, (kneeling) (Lichfield Engineer-in Charge), A.M. Beresford-Cooke (Head of Planning and Construction)
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(left & below) Control Room
(right) Telecine Room
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(left) Cooling room [De-mineralised water for valve cooling]
(right) High power visual/aural RF signal combiner
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(left) 5kW Final modulated visual RF output stage 2 x QY5-3000A (Mullard) [later to become driver stage for a 20kW RF output stage.
(right) Partly assembled view |
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(left) A typical water cooled Test Load
(right) Final 20kW visual RF output stage, partly assembled [Originally 2 x 4W 20000A (Eimac), later changes to 2 x CAS1 (MO Valve Co.) |
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(left) View of half of 20kW visual output stage, showing water-cooling feeds and coaxial RF output assembly.
(right) Modulated RF amplifier 4kV power supply. 6 x RR3-1250 (Mullard)
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(left) Transmitter front view (from transmitter hall)
(right) View of control room (from transmitter hall) |
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(left) Crystal Drive unit
(right) Visual Modulation and Predistortion unit
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